Regulation 25-2
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.684(17) – Explanatory Notes to the Solas Regulations on Subdivision and Damage Stability of Cargo Ships of 100 Metres In Length and Over – (Adopted on 6 November 1991) - Annex - Explanatory Notes to the SOLAS Regulations on Subdivision and Damage Stability of Cargo Ships of 100 Metres in Length and Over - Part B - Regulation 25-2

Regulation 25-2

Parent topic: Part B

Paragraph 1.2

 This definition does not preclude loading the ship to deeper draughts permissible under other load line assignments such as tropical, timber, etc.

Paragraph 1.3

 The light ship draught is the draught, assuming level trim, corresponding to the ship lightweight. Lightweight is the displacement of a ship in tonnes without cargo, fuel, lubricating oil, ballast water, fresh water and feed water in tanks, consumable stores, and passengers and crew and their effects.

 The draught corresponding to the partial load line is given by the formula:

where:
d p = draught corresponding to the partial load line (m);
d l = draught corresponding to the deepest subdivision load line (m)
dls = light ship draught (m).

Paragraph 2.1

 The definition of Ls according to paragraph 2.1 of regulation 25-2 is illustrated in Figure 21.

Figure 21 Illustration of the definition of L according to paragraph 2.1 of regulation 25-2

 For the forward deck limiting the vertical extent of flooding, H max is to be calculated in accordance with the draught (d l) at the deepest subdivision load line, based on the corresponding formula in regulation 25-6, paragraph 3.3. The forward terminal position at the deepest subdivision load line is to be taken as indicated in figure 22 and the after one in a similar manner.

Figure 22 Forward terminal position at the deepest subdivision load line
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